TAOC's insulators use three different types of cast iron: gradation,high-carbon, and advanced high-carbon cast iron.The affinity of the vibration damping performance of these materials with sound quality has been recognized by various audio manufacturers, and they have found their way into the legs of many high-end record players and amplifiers. Use these insulators to give your audio equipment an upgrade, or to tune your system to make its sound uniquely your own.